MOUTH AT 4 YEARS. 



779 



Fig. 235. — Tables of incisors (nat. size). 



When rising four, the lateral milk incisors fall out and become 

 replaced by permanent ones, which do not become level with the 

 central incisors until the horse is foui' or nearly four years old. 

 At four years of age, the corner milk incisors are well worn down, 

 the upper ones being ready to be pushed out. The tushes, as a 

 rule, begin to show through the gum about this time. 



